JP2019129517A - Broadcast signal transmission/reception method - Google Patents

Abstract

To provide a broadcast signal transmission/reception method that facilitates reception of an application data file by providing a restriction on path information when a data content service is performed.SOLUTION: A broadcast transmission device 100 determines a path so as to prohibit setting in which fronts of any two base_directory_paths coincide with each other and one path constitutes a part of the other path with respect to a directory structure path of application data, and determines a path so as to prohibit setting in which fronts of arbitrary two directory_node_paths having the same base_directory_path coincide with each other and one path constitutes a part of the other path. A television reception device 140 obtains a file of the application data on the basis of the base_directory_path and the directory_node_path.SELECTED DRAWING: Figure 1

Description

  An embodiment of the present invention relates to a broadcast signal transmitting and receiving method in a broadcast signal transmitting and receiving apparatus.

  The multimedia service in advanced BS digital broadcasting and advanced broadband CS digital broadcasting is a generic term for subtitle service, text super service, and data content service. The provisions of Non-Patent Document 1 and Non-Patent Document 2 and the operation of Non-Patent Document 3 It is done according to the regulations.

  A data content service, which is one of multimedia services, is a service that provides application functions using HTML and the like that are asynchronous with broadcast programs. In this case, the application data constituting the application functions are transmitted using broadcast waves. It is divided into two types, the type that includes the type and the type that does not include the case of transmitting using broadcast waves.

  For types including application data transmitted using broadcast waves, the transmission method is defined in Non-Patent Document 1 as the application transmission method, and the operation method is defined in Non-Patent Document 3 as the operation of the data transmission method. ing.

  In the application transmission method defined in this non-patent document 1, data constituting an application is encapsulated in an asynchronous type MPU (Media Processing Unit) in file units and transmitted, and control information of data constituting an application is also transmitted. , MH-AIT (MPEG-H Application Information Table), and data transmission messages.

ARIB STD-B60 1.10 version revised on July 27, 2017, Radio Industries Association of Japan ARIB STD-B62 1.7 version revised on July 27, 2017, Japan Radio Industry Association "Multi-media coding method (second generation) standard in digital broadcasting" ARIB TR-B39 Version 1.5 Revised on October 17, 2017, Japan Radio Industry Association

  When the broadcast signal receiver activates the data content service, for example, the path described in the URL_base_byte of the MH-transmission protocol descriptor included in the MH-AIT and the initial_path_byte of the MH-simplified application location descriptor included in the MH-AIT Receive files necessary for starting services based on the information. In addition, an unreceived file that is appropriately referred to by the application during application startup is received with reference to path information included in the data transmission message.

  However, the rules regarding the path information included in the MH-AIT and the data transmission message have no restriction except that the end of the character string of the path information ends with "/". For this reason, when processing the data content service, there is a possibility that the analysis of the path for receiving necessary files may be complicated, and in some cases, there is a problem that the path analysis can not be performed correctly. It was.

  Therefore, the present embodiment provides a broadcast signal transmission / reception method in a broadcast signal transmission / reception apparatus that easily processes reception of a necessary application data file by providing restrictions on path information when performing a data content service. With the goal.

According to a broadcast signal transmitting and receiving method of the present embodiment, there is provided a transmitting device for broadcasting a broadcast program and application data for realizing an application function added to the broadcast program by a broadcast signal, and the broadcast program included in the received broadcast signal. In a broadcast signal transmission / reception method realized by a receiving device that displays the application data on a display,
In the transmitter,
Directory for generating the application data file, generating control information for transmitting the generated file by the broadcast signal, and arranging the plurality of files when generating the plurality of files when generating the file With respect to paths in the configuration, any two base_directory_paths determine the path so that they do not allow a setting that matches forward and one path forms part of the other path, and any two base_directory_paths are the same A path is determined so that directory_node_path is a forward match and a setting in which one path constitutes part of the other path is prohibited, and the determined base_directory_path and directory_node_path are arranged in the control information, and the broadcast Video data and audio data constituting the program, the generated application data and Sends said control information form,
In the receiver,
Receiving the video data and audio data, the application data, and the control information, and obtaining the file of the application data based on the base_directory_path and the directory_node_path extracted from the received control information;
It is a broadcast signal transmission / reception method.

FIG. 1 is a diagram illustrating a configuration example of an entire system including a broadcast signal transmission device (also referred to as a broadcast station), a broadcast signal reception device (also referred to as a television reception device), and a service provider device according to the present embodiment. FIG. 2 is a diagram schematically showing the configuration of the first basic function of the broadcasting station of FIG. FIG. 3 is a diagram schematically showing the configuration of a television receiver. FIG. 4 is a diagram showing an outline of transmission of a broadcast signal of a broadcasting station in the case of performing data content service. FIG. 5A shows a processing flow in which the broadcast signal transmitting apparatus 100 determines a directory structure of a file constituting application data and sets a value in the DDMT based on the determined directory structure when transmitting the application data. It is. FIG. 5B shows a processing flow of data content service activation when the broadcast signal receiving apparatus receives a broadcast program and a data content service is added. FIG. 6 shows an example in which base_directory_path, directory_node_path, and file_name are set when two DDMTs of DDMT1 and DDMT2 are transmitted in a session. FIG. 7 shows an example in which DDMT base_directory_path, directory_node_path, and file_name are combined to be d1 / d2 / d3 / f1.

  Embodiments will be described below with reference to the drawings.

  FIG. 1 is a diagram illustrating a configuration example of an entire system including a broadcast signal transmission apparatus (also referred to as a broadcast station) 100, a broadcast signal reception apparatus (also referred to as a television reception apparatus) 140, and a service provider apparatus 120 according to the present embodiment. It is.

  The broadcast signal transmission device 100 includes a broadcast program server 101, a first application management / distribution unit 102, a first application server 103, and a first basic function 104.

  The first basic function 104 is a basic function of the broadcasting station 100 and has a function of encoding (also referred to as encoding) and multiplexing a video signal, an audio signal, and the like of a program to be broadcast and sending it as a broadcast signal. .

  The broadcast program server 101 is an area in which programs to be broadcast as the broadcast station 100, program titles, program IDs, program outlines, names of performers, broadcast dates and times, and other data are stored in advance.

  Also, the broadcast station 100 can add a data content service that simultaneously provides an application function such as HTML by a broadcast wave to a program to be broadcast. In this case, the broadcasting station 100 can arrange the first designation information indicating that the application function is added to the broadcast program in the transmission control signal, and send it as a broadcast signal by the first basic function 104. . The first specification information is, for example, an application service descriptor disposed in MPT (MMT Package Table) described in Non-Patent Document 1.

  The first application management and distribution unit 102 manages data stored in the first application server 103, which is necessary for adding an application function to a broadcast program. The first application management / distribution unit 102 also distributes the managed application functions to the broadcast signal receiving apparatus 140.

  The first application server 103 is an area for preliminarily storing data for adding an application function to a broadcast program.

  The service provider apparatus 120 can add a service that simultaneously provides application functions such as HTML to the program broadcast by the broadcast station 100 via the network 180 in cooperation with the broadcast station 100.

  The service provider device 120 includes a second application management / distribution unit 121 and a second application server 122.

  The second application management and distribution unit 121 manages content and applications stored in the second application server 122 and distributes the content to the television receiver 140.

  The second application server 122 is an area for storing content and applications to be provided to the television receiver 140.

  In response to the request from the television receiver 140 that has received the first designation information, the service provider device 120 performs second application management / distribution of applications and contents stored in the second application server 122. The data is transmitted to the television receiver 140 by the unit 121 via the network 180 such as the Internet.

  The television receiver 140 includes a digital broadcast reception function (second basic function 141), a communication control unit 142, and an application control unit (also referred to as a file processing unit) 143. Also, the television receiver 140 can acquire an application from the service provider device 120 via the network 180 and operate the application.

  The second basic function 141 is a basic function as a television receiver, receives a broadcast wave transmitted from the broadcast station 100, and encodes an encoded video signal (also referred to as a video stream) included in the broadcast wave. ), Encoded audio signal (also called audio stream), application data and transmission control signal are separated, video signal and audio signal are decoded, application data is received, transmission control signal is analyzed, etc. It has a function to do.

  The second basic function 141 includes peripheral devices connected to the television receiver 140, such as a display 160, a speaker 161, an HDD (Hrad Disk Drive) 162 bound to the television receiver 140, and a removable medium. It also manages the connection with 170 and the transmission and reception of data.

  The communication control unit 142 controls transmission and reception of data when the television receiver 140 communicates with the service provider device 120 via the network 180.

  The application control unit 143 manages and controls control information such as MH-AIT and data transmission message sent from the broadcast station 100 by the application transmission method. The application control unit 143 also accesses the cache data unit 309, and acquires a file necessary for performing a data content service from the cached data.

  The display device 160 has a built-in speaker 161 and displays the video signal decoded by the second basic function 141 in the display area and outputs an audio signal to the speaker 161. The speaker 161 incorporated in the display 160 may be an external speaker connected by an I / F such as USB.

  In the example of FIG. 1, the display device 160 is described as a separate body from the television receiver 140, but may be integrated with the television receiver 140 as one function of the television receiver 140.

  FIG. 2 is a diagram schematically showing the configuration of the first basic function 104 of the broadcasting station 100 of FIG. The first basic function 104 includes a video encoder 201, an audio encoder 202, a subtitle encoder 203, an application data generation unit 204, and a transmission control signal generation unit 205 for generating a transmission control signal.

  The video encoder 201 encodes the video of the program A read from the broadcast program server 101 as a program to be broadcast from now. The codec type of the video encoder 201 is MPEG-2, H.264, or H.264. H.264 (AVC: Advance Video Coding), H.264. Any one of H.265 (HEVC: High Efficiency Video Coding) may be used. Also, the codec type is not limited to this.

  The audio encoder 202 encodes the audio of the program A read from the broadcast program server 101 as a program to be broadcast from now on.

  The subtitle encoder 203 encodes subtitles of the program A read from the broadcast program server 101 as a program to be broadcast from now.

  When adding a service that simultaneously provides an application function such as HTML to the program A read from the broadcast program server 101 as a program to be broadcast from now on, the application data generation unit 204 generates application data constituting the application function. The application data is composed of a plurality of files, and the application data generation unit 204 determines the directory configuration of each file in order to transmit these files by a broadcast signal.

  The transmission control signal generation unit 205 includes control information related to the configuration of the broadcast wave including a video stream, an audio stream, a transmission control signal, and the like included in the broadcast wave broadcast by the broadcast station 100, and the program name and broadcast of the program to be broadcast. And generating control information on a broadcasted program including time and the like. The transmission control signal generation unit 205 also generates control information related to application data generated by the application data generation unit 204. Control information of application data generated by the transmission control signal generation unit 205 will be described with reference to FIG.

  The scrambler 206 scrambles the output of the video encoder 201, the output of the audio encoder 202, the output of the subtitle encoder 203, and the output of the application data generation unit 204 as necessary.

  The output of the transmission control signal generation unit 205 and the video, audio, subtitles, and application data scrambled by the scrambler 206 as necessary are multiplexed by the multiplexing unit 207 and sent to the transmitter 208 as a multiplexed stream. The transmitter 208 transmits the broadcast wave from the antenna. As a multiplexing method when multiplexing is performed by the multiplexing unit 207, a method of MMT (Mpeg Media Transport) is used.

  FIG. 3 schematically shows the configuration of the television receiver 140. As shown in FIG. The television receiver 140 includes a second basic function 141 which is a function of receiving a broadcast wave, a communication control unit 142, and an application control unit 143. The television receiver 140 is also connected to the display 160. The display 160 incorporates a speaker 161.

  The second basic function 141 includes a broadcast tuner 301, a demultiplexer 302, a descrambler 304, a video decoder 306, an audio decoder 307, a subtitle decoder 308, a cache data unit 309, and a transmission control signal analysis unit 310.

  The broadcast tuner 301 demodulates the stream (broadcast signal) transmitted by the broadcast wave. The demodulated stream (broadcast signal) is input to the demultiplexer 302. The demultiplexer 302 separates the input multiplexed stream into a video stream, audio stream, subtitle stream, application data, transmission control signal, and the video stream, audio stream, subtitle stream, application data to the descrambler 304. The transmission control signal is input to the transmission control signal analysis unit 310.

  The descrambler 304 descrambles each stream as necessary, the video stream to the video decoder 306, the audio stream to the audio decoder 307, the subtitle stream to the subtitle decoder 308, and the application data to the cache data unit 309. Enter each.

  The video stream is decoded by the video decoder 306, the audio stream is decoded by the audio decoder 307, and the subtitle stream is decoded by the subtitle decoder 308.

  The transmission control signal analysis unit 310 analyzes various control information included in the transmission control signal. The transmission control signal analysis unit 310 also sends MH-AIT, data transmission messages, and the like, which are control information related to application data, of the analyzed transmission control signals to the application control unit 143 for further analysis.

  The application control unit 143 manages and controls control information such as MH-AIT, which is control information related to application data, sent from the transmission control signal analysis unit 310, such as a data transmission message.

  Further, the application control unit 143 performs screen display control of data broadcasting by controlling the browser 311 using the cached data stored in the cache data unit 309. The browser 311 also generates subtitle screen superimposition data based on the output data of the subtitle decoder 308.

  The decoded video signal, subtitles, and display contents of data broadcasting are synthesized by the synthesizer 326 and output to the display 160.

  The audio data decoded by the audio decoder 307 is output to a speaker 161 incorporated in the display 160.

  The codec type of the video decoder 306 is H.264. H.265, but is not limited thereto, and MPEG-2, H.2 Any of H.264 may be used. Also, the codec type is not limited to this.

  The communication control unit 142 includes a network I / F 341 that is an I / F with the communication network 180 and a remote control I / F 342 that is an I / F with a remote controller (remote controller) 352.

  The communication control unit 142 can connect to the service provider apparatus 120 via the network 180 via the network I / F 341. The communication control unit 142 can acquire an application or content managed by the service provider device 120 via the network 180. The acquired application or content is sent from the communication control unit 142 to the browser 311 and used for display or the like.

  FIG. 4 is a diagram showing an outline of transmission of a broadcast signal of a broadcasting station in the case of performing data content service.

  When a data content service is added to the program B including the video component 401, the audio component 402, and the subtitle component 403, the transmission control signal generation unit 205 of the broadcasting station 100 generates the MPT 410 in which the application service descriptor is arranged, and transmits the transmission control signal. Send as.

  Further, the transmission control signal generation unit 205 of the broadcast station 100 generates and transmits the MH-AIT 420 in which the entry file of the data content service application added to the broadcast program B is set.

  Furthermore, the transmission control signal generation unit 205 generates and transmits control information necessary for transmission of application data for performing data content service.

  The control information necessary for transmitting the application data includes a DDMT (Data Directory Management Table) 421 having path information in the directory structure of the files constituting the application data, and information on the MPU to which the application data is transmitted. It includes a Data Asset Management Table (DAMT) 422 and a Data Content Configuration Table (DCCT) 423 having information on a PU (Presentation Unit) unit of application data.

  The application data generation unit 204 of the broadcast station 100 cooperates with the transmission control signal generation unit 205 to encapsulate the application data read from the application management / distribution unit 102 into asynchronous MPUs 430 and 431 for transmission.

  Application data is composed of a plurality of files. The application data generation unit 204 determines the directory configuration of each file in order to transmit application data by a broadcast signal. The path information in the directory structure of the file constituting the application data is transmitted to the television receiver 140 by the DDMT 421 described above. Some application data may further refer to other application data. In this case, URLs (Uniform Resource Locators) of other application data to be referred to are further described in the application data.

  As described above, path information for accessing a file in the data content service is described in the entry file information set in the MH-AIT 420 and the URL set in the application data, and the television receiver 140 Path information in the directory structure of these files is sent to the television receiver 140 as set in the DDMT 421 as described above.

  When the television receiver 140 recognizes the content of the URL from the received MH-AIT 420 data broadcast activation or the received application data, it receives the necessary file based on the information set in the DDMT 421, Access the received file and execute the data content service.

  An entry file is set in the MH-AIT 420, and application data to be accessed by the television receiver 140 based on the entry file is transmitted via a broadcast signal via the communication control unit 142. For example, application data 440 managed by the service provider device 120 connected via the network 180 may be used. In this case, a URL on the Internet is designated as the entry file information.

The non-patent document 3 specifies that the URL when referring to application data transmitted by broadcasting is in the following format.
<base_url><base_directory_path><directory_node_path><file_name>
<base_directory_path>: Base directory path described in DDMT <directory_node_path>: Directory node path described in DDMT
<file_name>: File name described in DDMT Here, <base_directory_path> and <directory_node_path> stipulate that the end of the character string ends with “/”, but “/” appears in the middle of the character string. It is not forbidden to put For this reason, the directory hierarchy in which files are placed is not necessarily two, but can be a deeper directory hierarchy.

Therefore, the broadcast signal transmitting apparatus 100 according to the present embodiment further provides the following restrictions on the path in the directory structure of the files constituting the application data.
(Restriction 1) In any two paths of base_directory_path, setting that forward match and one path form a part of the other path is prohibited.
(Restriction 2) When base_directory_path is the same, in the two arbitrary paths of the continuing directory_node_path, the setting is made such that the forward match and one path form a part of the other path.

  This limit may be, for example, a limit per data transmission session. As described in Non-Patent Document 3, the data transmission session is a period during which the application data configuration and the directory configuration that configure the data content service are the same.

  In FIG. 5A, when the broadcast signal transmitting apparatus 100 transmits application data, the directory structure of the files constituting the application data is determined based on the restrictions 1 and 2, and based on the determined directory structure. Shows a process flow for setting a value in the DDMT 421.

  The application data generation unit 204 reads application data to be transmitted to the television receiver 140 from the application management and distribution unit 102 (S501). The application data is composed of a plurality of files, and the application data generation unit 204 determines a directory structure in order to transmit the plurality of read application data files using a broadcast signal (S502). The application data generation unit 204 determines the directory configuration based on the restrictions 1 and 2 when determining the directory constituting the application data, and generates an index_item for transmitting the list of file_name as a part of the application data. .

  Also, when the application data generation unit 204 determines the directory configuration (S502), the transmission control signal generation unit 205 sets the base_directory_path, directory_node_path, and file_name of the DDMT 421 based on the information of the determined directory configuration (S503). The process ends (S504). However, file_name is not set in the directory node referenced by the MPU node descriptor in DAMT 422.

  Further, the transmission control signal generation unit 205 sets entry file information of the application of the data content service in the MH-AIT 420. In this case, the transmission control signal generation unit 205 sets the contents of the base_directory_path set in the DDMT 421 to the URL_base of the MH-transmission protocol descriptor included in the MH-AIT 420, and the contents of the directory_node_path and the file_name set in the DDMT 421 to the MH-AIT 420. Set in initial_path of the MH-simple application location descriptor included in.

  FIG. 5B shows a process flow of data content service activation when the broadcast signal receiving apparatus 140 receives a broadcast program and a data content service is added.

  When the transmission control signal analysis unit 310 of the broadcast signal receiving apparatus 140 receives the MPT 410 as the transmission control signal as described above, it starts data content service activation processing (S510).

  The transmission control signal analysis unit 310 confirms whether an application service descriptor is arranged in the received MPT 410 (S511).

  When the transmission control signal analysis unit 310 recognizes that the application service descriptor is disposed in the MPT 410 as a result of confirmation (Yes in S 512), the data content service is added to the program of the received broadcast wave Judge.

  When the transmission control signal analysis unit 310 confirms that the application service descriptor is arranged in the MPT 410, the transmission control signal analysis unit 310 then waits for the MH-AIT 420 to be sent as a transmission control signal.

  When the transmission control signal analysis unit 310 receives the MH-AIT 420 (S513), the URL_base and MH- of the MH-transmission protocol descriptor, which is the entry file information of the initial start application for which the application_control_code of the MH-AIT 420 is set as AUTOSTART. The initial_path of the simple application location descriptor is extracted (S514) and notified to the application control unit 143. As described above, the URL_base of the MH-transmission protocol descriptor is the base_directory_path set in the DDMT 421, and the initial_path of the MH-simple application location descriptor is the directory_node_path and the file_name set in the DDMT 421. Is set.

  The transmission control signal analysis unit 310 confirms whether or not the initial activation application has been sent by the broadcast wave (S515). If it has been sent by the broadcast wave (Yes in S516), the DDMT 421 and the DAMT 422 are sent. wait.

  When receiving the DDMT 421 and DAMT 422 (S517), the transmission control signal analysis unit 310 searches the DDMT 421 for information corresponding to the entry file information, and identifies the MPU corresponding to this by referring to the DAMT 422. Further, the location information of the asset corresponding to component_tag is extracted by referring to the MH-stream identification descriptor included in MPT 410, set in demultiplexer 302 together with MPU_sequence_number, and waits for application data to be received.

  When receiving the application data (S518), the transmission control signal analysis unit 310 notifies the application control unit 143.

  The application control unit 143 having received this notification notifies the browser 311 of the information of the entry file, and starts the data content service (S519).

  The browser 311 generates content to be displayed on the display unit 160 from the application data read from the cache data unit 309, displays the generated content on the display device 160 (S520), and ends the processing (S521).

  The application control unit 143 activates the data content service based on the URL_base of the MH-transmission protocol descriptor which is the entry file information and the initial_path of the MH-simple application location descriptor in the process of S519.

  At this time, although the application control unit 143 can uniquely identify the base_directory_path described in the DDMT 421 from the URL_base of the MH-transmission protocol descriptor, the directory_node_path described in the DDMT 421 from the initial_path of the MH-simple application location descriptor Matching with the information of file_name can be efficiently performed if directory_node_path and file_name of the DDMT 421 are set based on the restriction 2 described above.

  The application control unit 143 may recognize a URL to be further referred to as a result of analyzing the application data read from the cache data unit 309. The application control unit 143 accesses the application data temporarily stored in the cache data unit 309 based on the information of the recognized URL, and executes the data content service of the corresponding file. Alternatively, the application control unit 143 may access, for example, application data managed by the service provider device 120, which is connected via the communication control unit 142 via the network 180 based on the information of the recognized URL. . Here, the file designated by the URL may be received from within the broadcast signal and newly stored in the cache data unit 309.

  When application data to be temporarily stored in the cache data unit 309 is determined based on the entry file information, or information on a character string of a URL to be referenced as a result of analyzing the application data is recognized, the cache data unit 309 is When newly determining application data to be temporarily stored, the application control unit 143 matches the entry file information or the character string information of the recognized URL with the base_directory_path, directory_node_path, and file_name information described in the DDMT 421. Further, the MPU to be received is specified by collating with the DAMT 422. In the directory node referred to by the MPU node descriptor in the DAMT 422, matching with the information of the base_directory_path and directory_node_path of the DDMT 421 and matching with the DAMT 422 are performed to identify the received MPU.

  This matching operation can be efficiently performed when the base_directory_path and directory_node_path of the DDMT 421 are set based on the above-described limit 1 and limit 2.

  FIG. 6 shows an example in which base_directory_path and directory_node_path are set based on restriction 1 and restriction 2 when two DDMTs 421 of DDMT1 (601) and DDMT2 (602) are transmitted in a session. . The base_directory_path satisfies restriction 1 in DDMT1 (601) and DDMT2 (602). Also, in the DDMT 1 (601), the directory_node_path satisfies the restriction 2.

  FIG. 7 shows a case in which base_directory_path and directory_node_path of DDMT 421 are not set based on restrictions 1 and 2, and when any directory node is referred to by MPU node descriptor in DAMT 422, URL = An example is shown in which it is difficult to specify the MPU when newly caching a file represented by http: // localhost / d1 / d2 / d3 / f1. The base_directory_path does not satisfy restriction 1 in the DDMT1 (701) and the DDMT2 (702). Also, in the DDMT 1 (701), the directory_node_path does not satisfy the restriction 2.

  Since the application control unit 143 does not know the boundaries between base_directory_path and directory_node_path and file_name, it is possible to match the node corresponding to which of base_directory_path and directory_node_path set in DDMT 421 shown in FIG. , The judgment can not be made only by referring to the information of DDMT 421.

  Therefore, the application control unit 143 further refers to the DAMT 422, acquires the MPU corresponding to one of the node_tags, confirms the index_item in the MPU, and only when the expected value file name is included. It is possible to receive the MPU and judge that the file can be cached. If index_item does not contain the expected file name, it will attempt to receive MPUs of other nodes.

  When the application control unit 143 searches for a path in the directory configuration set in the DDDT 421 that matches the character string of the entry file information or the character string of the URL to be referred to, the number of directory hierarchies becomes large (large). As the number of combinations of DDMT 421 information to be searched increases, it may take time to acquire a desired file at the correct directory node, or the directory node set in the DDMT 421 that may be matched. There is a possibility that the process of sequentially acquiring MPUs corresponding to 失敗 fails and a desired file cannot be acquired.

  On the other hand, the broadcast signal receiving apparatus 140 according to the present embodiment refers to the information of the DDMT 421 because the information set in the DDMT 421 is set based on the restriction 1 and the restriction 2 as shown in FIG. It is possible to uniquely determine which directory node of the DDDT 422 matches the entry file information or the URL string to be referred to.

  As described above, the broadcast signal receiving apparatus 140 according to the present embodiment has the base_directory_path and directory_node_path information set in the DDMT 421 set based on the restrictions 1 and 2, so that the data only needs to be referred to the information of the DDMT 421. It becomes possible to specify a directory node including a desired file of the content service, and it becomes possible to efficiently obtain the desired file.

  Although several embodiments of the present invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and the gist of the invention, and are included in the invention described in the claims and the equivalent scope thereof. Furthermore, in each of the constituent elements in the claims, the constituent elements may be divided and expressed, or a plurality of the constituent elements may be expressed together or they may be expressed in combination, which falls within the scope of the present invention. Also, a plurality of embodiments may be combined, and an embodiment configured by this combination is also within the scope of the invention.

  In addition, the drawings may be schematically represented as compared to the actual embodiment in order to clarify the description, but they are merely examples and do not limit the interpretation of the present invention. In addition, in the present specification and each drawing, components that perform the same or similar functions as those described above with reference to the previous drawings are denoted by the same reference numerals, and repeated detailed description may be omitted as appropriate. . In addition, when the claims are expressed as control logic, when expressed as a program including instructions for causing a computer to execute, and when expressed as a computer-readable recording medium describing the instructions, the apparatus of the present invention is applied. is there. In addition, the names and terms used are not limited, and other expressions are included in the present invention as long as they have substantially the same contents and the same purpose.

100: broadcast station 101: broadcast program server 102: first application management / distribution unit 103: first application server 104: first basic function 141 · · · 2nd basic function, 142 · · · communication control unit, 143 · · · application control unit, 204 · · · application data generation unit, 205 · · · transmission control signal generation unit, 310 · · · transmission control signal Analysis department.

Claims (1)

A transmitter for broadcasting a broadcast program and application data for realizing an application function added to the broadcast program by a broadcast signal, and displaying on the display the broadcast program and the application data included in the received broadcast signal In a broadcast signal transmitting and receiving method realized by a receiving device,
In the transmitter,
Generate a file of the application data,
Generate control information when transmitting the generated file by the broadcast signal,
With regard to the path in the directory configuration in which the plurality of files are arranged in the case of generating the plurality of files when generating the files, any two base_directory_paths may be forward-matched and one path may form the other path portion The path is determined so that any two directory_node_paths with the same base_directory_path are forward-matching and one path forms part of the other path. Decide
The determined base_directory_path and directory_node_path are arranged in the control information,
Transmit video data and audio data constituting the broadcast program, the generated application data and the generated control information,
In the receiver,
Receiving the video data and audio data, the application data, and the control information, and obtaining the file of the application data based on the base_directory_path and the directory_node_path extracted from the received control information;
Broadcast signal transmission and reception method.

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